In this article, a multi-input multi-output sliding mode control methodology with constant switching frequency for single-phase quasi-Z-source inverters (qZSI) is proposed. The mathematical model of the entire system is derived in state-space form. The proposed sliding mode control is capable of controlling both dc and ac sides of the system concurrently. Unlike the existing methods, the proposed control does not require proportional-integral controller in the dc-side. Furthermore, it offers several advantages, such as simple implementation, reduced gain requirement, robustness against system parameters, and zero steady-state error in the load voltage. The fixed switching frequency is attained by altering the sliding manifold behavior inside a boundary layer. The power balance equation is used to generate the dc-side inductor current reference. The feasibility of the proposed control method is investigated experimentally when qZSI feeds linear and nonlinear loads.

中文翻译：

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用于单相准 Z 源逆变器的多输入多输出滑模控制器


在本文中，提出了一种用于单相准 Z 源逆变器（qZSI）的恒定开关频率的多输入多输出滑模控制方法。整个系统的数学模型以状态空间形式导出。所提出的滑模控制能够同时控制系统的直流侧和交流侧。与现有方法不同，所提出的控制不需要在直流侧使用比例积分控制器。此外，它还具有多种优点，例如实现简单、增益要求降低、系统参数的鲁棒性以及负载电压的零稳态误差。固定的开关频率是通过改变边界层内的滑动流形行为来获得的。功率平衡方程用于生成直流侧电感器电流参考。当 qZSI 馈送线性和非线性负载时，通过实验研究了所提出的控制方法的可行性。